Andrew Strominger

The final particle to be observed was the Higgs particle, observed like over a decade ago.

Higgs is already a decade ago.

But you better check me on that, yeah.

So much fun has been happening.

And so that's all pretty well understood.

There are some things that might or might not around the edges of that, you know, dark matter, neutrino masses, some sort of fine points or things we haven't quite measured perfectly and so on, but it's largely a very complete theory, and we don't expect...

anything very new conceptually in the completion of that.

Anything contradictory, yeah.

Yeah, yeah, yeah.

And it was all based on something called, let me not explain what it is, let me just throw out the buzzword.

renormalizable quantum field theory.

They all fall in the category of renormalizable quantum field theory.

They all fall under that rubric.

Gravity will not put that suit on.

So the force of gravity cannot be tamed by the same renormalizable quantum field theory to which all the other forces belong.

so eagerly submitted.

Sort of the one fully consistent model that we have

that reconciles, that sort of tames gravity and reconciles it with quantum mechanics is string theory and its cousins.

And we don't know what or if in any sense string theory describes the world, the physical world, but we do know that it...

is a consistent reconciliation of quantum mechanics and general relativity, and moreover one which is able to incorporate particles and forces like the ones we see around us.